*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body{
    position: relative;
    width: 100%;
    height: 100vh;
    background: #fff;

}
.container{
    
    position: relative;

}
.btn{
    position: absolute;
    top: 200px;
    left: 400px;
    width: 250px;
    height: 70px;
    border: none;
    background: gold;
    border-radius: 10px;
    font-size: 20px;
    /* color: #fff; */
}
.a{
    position: absolute;
    width: 20px;
    height: 20px;
    opacity: .6;
    animation: animate .5s linear;
    /* z-index: 555; */
    background: green;
    border-radius: 50%;
    transform-origin: center center;

}





@keyframes animate {
    100%{
    transform: scale(25);
    opacity: 0;
    }
}


